\begin{tabular}{|r||r@{}l|r|r@{ / }r|}\hline\hline
\mc{6}{|c|}{Average Surplus of Treatment}\\\hline\hline
Population & \mc{2}{c|}{Estimand} & p-value & \mc{2}{c|}{90\% Confi.}\\\hline
\mc{1}{|l||}{ Full } &           0.011 & $^{}$ &            0.35 &          -0.017 &           0.032 \\
\mc{1}{|l||}{ Treated } &           0.376 & $^{***}$ &            0.00 &           0.353 &           0.454 \\
\mc{1}{|l||}{ Untreated } &          -0.352 & $^{***}$ &            0.00 &          -0.435 &          -0.335 \\
\hline\hline
\end{tabular}
